House electric



A. vL. A THERTON. COMBINED RIVET HEATER AND HIV-ETER.

APPLICATION FILED SEPT. l i, 1920.

Patented-May 3, 1921.

UNITED STATES PATENT OFFICE.

i y. ALFRED L. ATHERTON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION F PENNSYL- 'VANIA.

' COMBINED RIVET-HEATER AND RIVETER. i

Patented May 3, 1921.

Application filed September- 11, 1920. Serial No. 409,539.

To all whom t my concern.'

Be it known that I, ALFRED L. ATHERTON,

` a citizen of the United States, and a resident y of Pittsburgh, in the countv of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Combined Rivet-Heaters and Riveters, of which the following is a specification.

My invention relates to rivet heaters and partlcularly to rivet heaters of the type wherein the rivets are heated by the passa e of electric current through them.

' in the piece of material to be riveted and a head formed on the end thereof either manuall or by a machine.

Ih a machine constructed in accordance with my invention, the rivet is heated and a head is formed on the head thereof by one o eration, thus the separate step of heating tle rivet is eliminated, as is also the operator whose sole duty was that of heating the rivet. j

In the preferred machine for practising my invention, an electromagnet of the socalled iron-clad type is connected in circuit with the rivet that is mounted in position for the heading operation. The' current flowing through the rivet in series with the electromagnet softens the rivet and the magnetic force of the electromagnet operates a heading member to form a head on the end of such rivet.

In the accompanying drawing,

Figure 1 is a sectional view of a machine constructed in accordance with my invention and Fig. 2 is a sectional View of a modification of my invention.

Referring to the drawing, two pieces of material 1 and 2 are mounted adjacent to each other 'and a rivet 3 is placed in position for having a head formed on one end thereof. An electromagnet 4, which is connected toa transformer 5, is provided for forminga head on the end of the rivet 3. .The transformer 5 comprises a primary wlndmg 6, which is connected to the conductors 7 and 8 ofl a-supply circuit, anda secondary winding 9. The secondary winding 9 of the transformer is connected in series with the rivet 3, and the energlzing coil 10 ofthe electromagnet 4. The number of turns included in the `primary winding 6 may be varied ,in any suitable manner in order to control the secondary current passing through the rivet 3 and the energizing coil of the electromagnet.

The electromagnet 4 comprises a magnetic shell 11 rwhich surroundsthe coil 10 and av core 12 which projects through the coil 10. A heading member 13 is attached to the end of the core 12 and, if so desired, it may be'formed integral with such core member.

The heading member 13 extends beyond the shell .portion 11 as shown in Fig. 1 of the drawing, in order to prevent the engagement of the shell member 11 with the material 1 and 2 that is being connected by rivets.

Upon energization of the transformer 5, the secondary current flowing through the rivet 3, softens such rivet, and simultaneously the energization of the coil 10 attracts the electromagnet toward the plates of materialfl and 2, which in this case must be composed of magnetic material. In such manner, the operation of softening the rivet is performed simultaneously with the operation of heading such rivet. Upon the completion of a head for the rivet 3, the electromagnet 4 may be moved to an adjacent rivet for forming a head thereon in a like manner.

The electromagnet shown in Fig. 2 is ,similar in operation to the electromagnet Modifications in the apparatus, and in the arrangement and location of parts may be made Within the spirit and scope of my invention and such modifications are intended to be covered by the appended claims.

I claim as my invention 1. In a combined riveter and rivet heater, the combination comprising a coil connected in circuit with the rivet to be heated, and means actuated by said coil for'forming a head on the rivet upon softening thereof by the flow of current through it.

2. In a combined riveter and rivet heater, the combination comprising a coil connected in circuit with the rivet to be heated, a core armature actuated by'said coil, and a heading member attached to said core and actuated thereby to form a head onl the end of;

the rivet.

3. In a combined riveter and rivet heater, the combination comprising a transformer, a coil connected to said transformer in series with the rivetto be heated, and means operated by said coil for formingr a head on the rivet upon softening thereof.

4. In a combined riveter and rivet heater, the combination With a supply circuit, a transformer connected to said supply circuit and having a primary and a secondary Winding, and a coil connected to said secondary Winding in series with the rivet to be heated, of a core armature operated by said coil, and

-means operated by said core for forming a head on the end of the rivet.

5. `In a Combined riveter and rivet heater, the combination With a rivet mounted in the material to be riveted and a transformer connected to a supply circuit, of a coil connected to said transformer in series with the rivet, and means operated by the coil for forming a head on the rivetupon softening thereof. V

6. In a combined riveter and rivet heater, the combination comprising a transformer, a rivet connected in circuit with said transformer, a coil also connected to said transformer, and means operated by said coil for forming a head on the end of the rivet uponl softening thereof'. v

7. In a combined riveter andr rivet heater, the combination comprising an electric circuit connected to the rivet to be heated, an

iron-clad electromagnet connected to saidn circuit, and means operated by said magnety ALFRED L. ATHER'roN. 

